it seems there is a change to the way parameters are shown in the ui (including a date picker! nice!) Is there any documentation on these? Any release notes?

Wasn’t it this way like for ages? 😄 I don’t see any recent related changes here. Also, this seems rather intuitive - do you have any specific questions about that? I could try answering them and if I can’t I’ll ask the UI team.

Hi Florien, you’re right we updated our json and dict inputs. You should see the related note and PRs in the 2021-12-14 release in the link Anna just shared.

Thanks Jenny, indeed it looks like I missed this one. Again, @Florian Kühnlenz if you have any questions about it, LMK

One more thing, is there a way to set the type used for parameters?

If type validation is what you’re asking, we currently don’t have this for Parameters in Prefect 1.0. However, Orion supports pydantic type validation for parameters.

No I would just like to be able to set the types used in the ui.

you can do it already by using specific data types for your default values. If your default parameter value is an integer, then the UI will also show Integer as the default type

But if I need none as default value to represent a not set value then there is no way currently? Also datetimeparameter does not seem to trigger the date type.

Regardless of which option you choose (e.g. as above Date vs. String), the type is only for the UI so that e.g. a business user would not make a mistake by typing date in a wrong format, but the parameter value passed to your flow will still be a string. Again, I wouldn’t rely too much on that to set specific types, there is no type validation there, it’s only for ease of use when triggering your flows from the UI. The flow code should handle type validation/type casting when needed.